JP2004353279A - Foundation construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation construction method for improving soil using local sediment without soil removal. <P>SOLUTION: A press-in tool of screw shape is rotationally pressed into the present condition ground to press in ground sediment to the side to form a cavity, and the cavity is filled with a mixture of the local sediment and cement or cement milk, or sandbags containing the local sediment. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a method for constructing a small-scale building foundation for treating residual soil generated in a building foundation work at a place where the soil is generated.
[0002]
[Prior Art and Problems to be Solved by the Invention]
Conventionally, various structures and construction methods have been proposed as foundations for small-scale buildings, but footing is often provided. (See, for example, Patent Document 1) In the case of a soft ground and a ground having a required ground strength is deep, as shown in FIG. 2, the excavation depth H for forming the foundation is deep, and the improvement width W1 is also wide, so that the ground is improved. Even if it does, construction is not easy, and it takes time and effort to treat the excavated earth and sand on site.
[0003]
The applicant has previously developed a method in which a screw-shaped press-fitting tool is rotated and pressed into the required location on the local board, a number of cavities are formed by pressing the ground soil and sand laterally, and the cavities are filled with ready-mixed concrete. I have. (See Patent Literature 2) The present invention has been developed to reduce the generation of residual soil by developing the above-mentioned invention.
[0004]
[Patent Document 1]
Japanese Patent No. 2614030 [Patent Document 2]
Japanese Patent Application No. 2003-18897
[0005]
[Means for Solving the Problems]
According to the present invention, a screw-shaped press-fitting tool is rotationally press-fitted into a required portion of the ground, and a ground is formed by press-fitting the ground soil laterally, and a mixture of local soil and cement or a local sand is formed in the hollow. This is a basic construction method characterized by filling and compacting the material put in the container.
[0006]
【Example】
Example 1
In this example, the trench 1 is excavated by piercing the ground so as to have a conical cross section. As the press-fitting tool for excavation, the surrounding cone is pushed into the surroundings by rotating and press-fitting the top cone 4.
Cement or cement milk is mixed with the local earth and sand excavated in the above-mentioned excavation trench, and this is filled while being rolled, and the foundation 3 is formed thereon.
[0007]
Example 2
In the natural ground, the ground 3 is excavated with a press-fitting tool from the ground surface G2 to the strong ground G1, that is, the ground having the required ground strength, and the sandbags 2 are stacked and compacted in the groove. Pack to the height corresponding to the bottom. Next, the foundation 3 is built.
As the earth and sand packed in the sandbag 2, crushed stone, a mixed material of sand, or a material obtained by mixing cement with local earth and sand is used. As shown in FIG. 3, the shape of the sandbag 2 is approximately 20 to 30 cm on one side.
[0008]
【The invention's effect】
The present invention has the above-described structure, and can reach the lower part of the foundation to a hard ground where a required ground strength can be expected without using a foundation pile or the like, and further, uses excavated earth and sand excavated at a construction site such as crushed stone or sand. If necessary, the cement can be compounded, hardened, and further placed in a sandbag to prevent environmental pollution, thereby improving the ground, reducing the amount of earth removal work and performing economical construction.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first embodiment.
FIG. 2 is an explanatory diagram.
FIG. 3 is a perspective view of a sandbag.
FIG. 4 is a longitudinal sectional view of a second embodiment.
FIG. 5 is a front view of a cone.
FIG. 6 is a plan view of FIG. 5;
[Explanation of symbols]
1 ... groove, 2 ... sandbag, 3 ... foundation, 4 ... cone

Claims (2)

A screw-shaped press-fitting tool is rotationally pressed into a required part of the ground, and a ground is formed by pressing the ground in the lateral direction to form a cavity, and the cavity is filled with a mixture of local earth and sand and cement. And the foundation building method. A foundation characterized by rotationally press-fitting a screw-shaped press-fitting tool into a required part of the ground, forming a cavity by pressing ground soil into the side, and filling the cavity with local soil and sandbags for filling and rolling. Construction method.

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